Since I still needed to finish the inboard aileron bracket using the service bulletin design, I got to work by deburring its holes, smoothing the edges, and scuffing all of the surfaces. Then I wiped down the parts with some alcohol and sprayed them with some primer. After the primer had dried long enough, I used the hand squeezer to rivet the bracket together.

Next, I pulled out all of the appropriate length bolts and inserted them into the holes in the ribs that also go through the main spar. Each of these holes have a different length bolt depending on the thickness of the spar in the location. None of these nuts were tightened to final torque spec since I knew I would need to temporarily loosen some of them for the riveting process.

What's next? Time to rivet the ribs to the spar.